Apply logarithmic derivatives
The function is defined by the rule shown below
\[f(x)=\frac{1}{2}\,\log_e\left(-x - 1\right) + 1\]
The logarithm is defined when its argument is positive
The point on the curve is
\[P=(-2,1)\]
The function is defined by the rule shown below
The logarithm is defined when its argument is positive
The point on the curve is